Exhaust-muffler.



No. 738,858. 7 PATENTED SEPT. 15, 1903.

a. P. SWAIN.

EXHAUSI MUFFLER. APPLICATION FILED 00120, 1902.

I0 MODEL.

A T TORN E Y.

THE uonms PETERS co. PHOTO-LITHO, WASHINGTON, 0. a.

UNITED STATES Patented September 15, 1903.

PATENT OFFICE.

GEORGE F. SWAIN, OF HARVEY, ILLINOIS, ASSIGNOR OF ONE-HALF TO HENRY E.KELLOGG,OF HARVEY, ILLINOIS.

EXHAUST-MUFFLER.

SPECIFICATION forming part of Letters Batent No. 738,858, datedSeptember 15, 1903.

I Application filed October 20; 1902. Serial No. 128,050. (No model.)

To aZZ whom it may concern:

Be it known that I, GEORGE F. SWAIN, a citizen of the United States,residing at Harvey, in the county of Cook and State of Illi nois, haveinvented a new and useful Improvement in Exhaust-Mufflers forGas-Engines, of which the following is a specification.

My invention relates to muiilers for the exhaust-gas of gas,petroleum,gasolene, or other similar internal-combustion engines; and myobject is to provide means adapted to diffuse the waste gas withoutundue back pressure to such a degree by virtue of eddy-currents, causedby a series of specially-formed and relatively arranged batflers, thatthe final escape into the atmosphere will be free from the disagreeablenoise always present when a free exhaust is permitted.

Still another object is to construct the device so that a few simpleparts only are necessary to attain the desired result, and such partsare so relatively arranged that they may be quickly and easily assembledor taken apart, even after long use, by a comparatively unskilledperson, the same being fully described hereinafter, and illustrated inthe accompanying drawings, in which---- Figure 1 is an axial section ofall the parts with exception of an axial rod for supporting the bafilesand the nuts forthe rod which hold the latter from longitudinal movementand retain the parts of the casing in proper position. Figs. 2 and 3 arerespectively a side elevation and a plan of a hollow truncated coneadapted to be secured to an axial rod within the casing shown in sectionin Fig. 1. Figs. 4 and 5 are respectively a side elevation and plan of atruncated cone adapted to also be mounted upon an axial rod and isprovided with a base flange or ledge of smaller diameter than the insideof the casing shown in Fig. 1.

Similar numerals indicate like parts throughout the several views.

The main body 2 of the casing in this instance and in the end portions 3and 4 are made of double metal walls having a filling of asbestos orsome other similar heat-resisting and low-heat-conducting material inthe 50 interspace between the walls. The end portions 3 and 4 of thecase are each connected with the main body by means of short hollowcoupling-pieces 5 and 6, which have annular grooves to receive the endsof the casings. Caps 7 and 8 cover the outer ends 01": parts 3 and 4 ofthe casing and have annular grooves to receive the ends of the latter.

9 and 10 are partitions in the coupling"- pieces, and short tubes 11 and12 join the partitions and form passage-ways through the lat ter, andthus connect the end chambers with the main body portion of the casing,the end chambers receiving waste gas through the holes 13 and 14.

In the baffles comprising truncated cones from 15 to 22, inclusive,cones 16, 18, 19, and 21 are hollow and have a central orifice ororifices 23, Fig. 3, a cross-piece bridging the central orifice andhaving a hole 24, through which is disposed the axial supporting-rod 25,upon which they are mounted. Cones 15, 1'7, 20, and 22 each have a hole26 to receive rod 25, upon which theyvare mounted, and these cones haveeach a base-flange 27, whi ch should subtend about a right angle to thesides of the cone and have a diameter smaller than the inner diameter ofcasing 2. All the cones are held in longitudinal position on axial rodby means of sleeves, as indicated by 28, and by end sleeves 30 and 31,which are held against the end cones by means of springs 32 and 33, thelatter contacting the covers 7 and 8, through which rod 25 is disposedand held by the screw-threaded nuts, as shown.

At the intermediate-of-length portion of casing 2 are holes 34 betweencones 18 and 19 for the outlet of the diffused waste gas. The arrowsindicate the course of the waste gas after its entrance at holes 13 and14, thence through the end chambers and the short pipes 11 and 12, afterwhich it is thrown outwardly into eddies by contact with the sides andbase-flanges of cones 15 and 22, thence inwardly against the sides ofthe large cones 16 and 21, and so on, until by a succession of similarmovements in whirling currents it is admitted to the central chamber andout through holes 34.

In practice the muffler, as shown and described, produces at each halfend portion only a duplicate effect of the opposite end, but is betteradapted to a double-cylinder engine than if it were made single.

The arrangement of mounting all the cones on an axial rod permits partof them, such as 16, 18, 19, and 21, to have the rim thereof inremovable contact with the inside of the easing, and thereby hold thecomparatively light axial rod firmly in position, and with the othercones 15, 17, 20, and 22 suspended within the casing entirely out ofcontact with the sides thereof, so that the entire set is easilyremoved. The placing of the cones with the small end one wayin each endgroup permits of an easy flow of the waste gas, yet produces so manyeddy-currents that sufficient diffusion is attained without undue backpressure upon the engine-piston.

I claim as my invention 1. In an exhaust-muffier for gas-engines, thecombination with a chamber for confining the exhaust-gas and havinginlet and outlet passage-ways of a rod mounted in the chamber, a seriesof cones mounted on the rod of alternately-different diameters, andpassage-ways in those of the largest diameter near the rod.

2. In an exhaust-muflier for gas-engines, a casing having acentrally-disposed rod therethrough, a double series of alternately-disposed differently sized truncated cones mounted on the rod at a shortdistance apart, one series of cones having a central passagewaytherethrough and the base-rims thereof in close proximity to the casing,the other series of cones having the rims disposed at a short distancefrom the casing, which latter is provided with an inlet-orifice at oneend of the series of baffles, and an outlet-orifice at the opposite endthereof.

3. In an exhaust-muflier for gas-engines, a casing having acentrally-disposed rod therethrough, a series of separated truncated cones mounted on the rod, and each cone having a passage-way therethroughnear the rod and the base-ring thereof in close proximity to the casing,in combination with a series of cones mounted on the rod. in alternateorder relative to the first-named cones, but separate therefrom, andwith the base-rims disposed a short distance from the casing, andpassageways leading into and out of the casing and between the severalcones, substantially as stated.

4:. The combination with a casing formed with inlet and outlet passages,of removable covers therefor, a rod arranged in said casing andprojecting through said covers, securing means in the ends of said rod,and baffles removably arranged 011 said rod.

5. The combination with a casing formed with inlet and outlet passages,of two continuous series of baffles arranged in said casing, the bafilesof each series being oppositely disposed to the baffles of the otherseries, and means for supporting the said baffles.

6. The combination with a casin g provided with inlet and outletpassages, of arod mounted in said casing, bafiles loosely mounted 011said rod, means for holding said baffles in their relative positions,and a springepressed means engaging the end baffles.

7. The combination with a casing provided with inlet and outlet ports,and a plurality of resiliently-m ounted baflles arranged therein.

8. The combination with the casing, of a rod arranged in said casing, aplurality of baffles loosely mounted on said rod; and spring pressedsupporting means for said baflies.

9. The combination With the casing provided With inlet and outletopenings, of removable covers for said casing, arod arranged in saidcasing and extending through said covers, baflles mounted on said rod,sleeves 8 interposed between said baflies and covers, and springsinterposed between the end sleeves and covers.

In testimony whereof I have signed my name to this specification in thepresence of 90 two subscribing witnesses.

GEORGE F. SIVAIN.

WVitnesses:

OSCAR SNELL, HENRY E. KELLOGG.

